1090 THE VOYAGE OF H.M.S. CHALLENGER. 



mouth. Coronet of the peristome with twelve to fifteen short conical convergent feet, shorter 

 than half the thorax. 



Dimensions. — Cephalis 0'06 long, 0-09 broad ; thorax 0-04 long, 0-06 broad. 



Habitat. — Central Pacific, Station 272, depth 2600 fathoms. 



2. Desmospyris cyrtocolpos, n. sp. 



Shell smooth, with deep sagittal and collar strictures. Pores subregular, circular, double-con- 

 toured, very small and numerous. Cephalis nut-shaped, larger than the short truncate thorax. 

 Coronet with eighteen to twenty-four slender, irregular, pointed, convergent feet, about twice as long 



as the thorax. 



Dimensions. — Cephalis 0'08 long, 0'12 broad ; thorax 0'04 long, O^l broad. 

 Habitat. — Western Tropical Pacific, Station 225, depth 4475 fathoms. 



3. Desmospyris anthocyrtoides, Haeckel. 



Petalosjryris antJiocijrtoides, Biitsclili, 1882, Zeitschr. f. wiss. Zool., vol. xxxvi. pp. 533, 539, 

 Taf. xxxii. fig. 19, a-c. 



Shell tuberculate, with slight sagittal and sharp collar strictures. Pores subregular, circular. 

 Cephalis nut-shaped, larger than the short truncate thorax. Coronet with fifteen to twenty short 

 conical, parallel and vertical feet, about as long as the thorax. 



Dimensions. — Cephahs 0'06 long, 0'09 broad; thorax 0'02 long, 0-G7 broad. 



Habitat. — Fossil in Barbados. 



4. Desmosp>yris carpocanium, n. sp. 



Shell smooth, with slight sagittal and shght collar strictures. Pores subregular, circular, small 

 and numerous. Cej)halis campanulate, smaller than the ovate thorax. Coronet with fifteen to 

 twenty irregular lamellar feet, which are longer than the thorax, pointed, nearly vertical and 

 parallel. 



Dimensions — Cephalis 0*05 long, 0-08 broad ; thorax 007 long, 01 broad. 



Habitat. — South Pacific, Station 298, depth 2225 fathoms. 



Family LV. Androspyrida, n. fam. (PI. 88-90). 



Definition, — S p y r o i d e a with galea and thorax ; the shell composed of a bilocular 

 cephalis and of two secondary joints, a galea arising from its upper face, and a thorax 

 arising from its lower face. 



